Valve-grinding machine



4D. APPLEGATE. VALVE GRINDYIN'G MACHINE. APPLICATION men NOV. 26, 1921.

Pafented Oct. 24, 1922.

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INVENTOR Damel. Applegai'e AHorney.

' Patented Oct. 24,1922.

DfAPPLEGATE.

VALVE GRINDING MACHINE. APPLICATION FILED NOV. 26, 1921.

1,433,170. Patented Oct. 24,1922.

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D. APPLEGATE.

VALVE'GRINDING MACHINE. APPLICATION FILED Nov.2s, I921.

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INVENTOR Daniel Applegafe D. APPLEGATE.

VALVE GRINDING MACHINE. APPLICATION FILED Nov. 26. I921.

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NVENTOR Danie. Applegafe Per Patented Oct. 245, 1922.

Jatented Get. 24, i922.

DANIEL APPLEGATE, 0F PORT CLINTON, OHIO,

VALVE-GRINDING- MACHINE.

Application filed November 26, 1921. Serial No. 517,899.

To all whom it may concern:

Be it known that I, DANIEL ArrLnoATn, a citizen of the United States, residing at Port Clinton, in the county of Ottawa and State of Ohio, have invented certain new and useful Improvements in Valve-Grinding Ma chines, of which the following is a specification.

My invention relates to valve grinders for grinding valves of the mushroom type in common use on internal combustion engines.

The object is to devise a grinder capable of operating simultaneously on all the valves of an engine, thereby economizing time and labor as well as reducing the cost of operation.

Another object of my invention is to construct a grinder having a partial reverse rotation and an up and down movement closely imitating hand operation.

In the accompanying drawings, similar symbols designate similar parts through the several views.

Figure'l is a front view of a grinder capable of grinding the valves of a four cylinder engine.

Fig. 2 is a top view thereof.

Fig. 3 is anend view showing the parts in grinding position.

Fig. 4 is a section on line a-a, Fig.

Fig. 5 is an end view showing the position of the valve grinder turned backward and removed from the valves.

Fig. 6 is a view of the valve stem holder and of the oscillator.

Figs. 7 and 8 show alternate constructions of valve bits.

Fig. 9 shows the valve stem with its oscillating lever.

Fig. 10 is a top view of Fig. 8.

Fig. 11 shows the reciprocating bar connecting rod, and

Fig. 12 the oscillating lever pin.

The machine is mounted on a base 1 having holes through which pass stub bolts 2 threaded into the engine so as to hold the base fast on the top of the same. 3 and 4 are standards bolted to the base, each provided with a bearing box 5 and 6 into which is mounted a shaft 7 carrying a driving cog wheel 8 which is in mesh with a pinion 9 mounted on a shaft 10 revolving in bearings 11 and 12. The inner end of shaft 10 terminates in a crank 13 having a pin 14 on which one end of connecting rod 15 is mounted. The other end of rodl5 has a slot 16 at right angles thereto in which is mounted a pin 17 connected to a channel bar 18 by means of 1 a bracket 19. Upon the base 1 are fastened brackets 20 and 21 by bolts 22 and 23. These brackets are provided with elongated slots 20 to guide the up and down movement of shaft 24 which is normally kept at the top of slot 2O by a spring 54 as shown. Shaft 24 carries the grinding spindles 25 which are mounted in brackets 26 fastened to shaft 24 by set screws 27. The bracket 26 is bifurcated at its outer end so as to form sep arated projections 28 provided with coinciding perforations forming bearings for spindle 25. Spindle 25 has a threaded stem to receive a nut 29 serving a double purpose: F rst, as an abutment to a spring 30 which gives the required pressure on the grinding tool. Second, as an adjusting means for the spindle 25. The lower end of spindle 25 is provided with a fixed pawl 31 mounted in a slot 32 as shown and retained in place by a pin 33 which projects sufficiently off spindle'25 to engage slot 34 of pin 36 mounted in the side of channel bar 18. Channel bar 18 is suspended from shaft 24 by means of hangers 35 fastened to the shaft by set screws 40. The lower ends of hangers 35 are each provided with a slot 37 in which reciprocates bar 88 forming part of channel bar 18. By the construction so far described the purpose of bar 18 will be understood. The power to reciprocate the same is derived from driving gear 8 through pinion 9, shaft 10, crank 12, pin 14, connecting rod 15 and channel bar pin 17. The reciprocation of bar 18 will impart an oscillating movement to spindle 25 through pin 83 engaged in slot 34 of pin 36 mounted in bar 18. The oscillating of spindle 25 will cause member 31 to engage teeth'41 of a valve bit 42 engaging valve 43 so as to give an intermittent movement to the valve. To properly grind a valve it is necessary to apply an intermittent pressure thereon so as to allow the even distribution of the grinding powder on its seat. The mechanism provided for that purpose is constructed as follows: To a bracket 44 bolted to base 1 is hinged one end of bar 45 having its other end hingcdly connected to a lever 46 formed as follows: The ends are bent at right angles forming the part 47 which has a notch 48 for a purpose hereinafter described. The center part is bent as at 49 to form a handle. Notch 48 of part 47 engages the top of a slot 52 in the end of an upright bar 53 which is bolted to base 1 as shown. The operation of this pressmg arrangement is as follows:

Referring to Fig. 3 it will be seen that notch 48 in part 4L7 of bar 46 engages the top of guide bar which, on account of being fulcrumed at 55, will, when handle 49 is pulled downward, press down guide bar 50 and as this bar is fixed to shaft 24 the same will travel downward in slots 20 and cause spindle 25 to press the valve being ground.

In the above description I have described a form of my grinder which has given practical results but it should be understood that many alternative constructions may be produced which would not change the essence of my invention as covered by the following claims.

Claims:

1 A valve grinder of the class described, a base, a shaft-mounted in zslots'over said base so as to move vertically, a plurality of brackets adjustably fastened to said shaft, spindles carried by said brackets and means carried by said shaft to oscillate said spindles.

2. A valve grinder of the class described, a base, brackets having elongated slots fastened to said base, a shaft mounted in said slots, spring means to normally hold said shaft at the upper part ofsaid elongated slots and means to act against said spring means to press said shaft downward in said elongated slots.

3. A valve grinder of the class described, a base, brackets having slots fastened to said base, a shaft mounted in said slots, spring means to normally hold said shaft at the upper part of said slots and means to act against said spring means to press said shaft downward in said slots, brackets carried by said shaft, spindles movably mounted in said brackets, ratchet bits mounted on said spindles and means to oscillate said spindles to operate said ratchet bits.

4. In a valve grinder of the class described, a base, standards mounted on the base having bearings in which a shaft carrying a driving gear is journaled, a pinion meshing with the driving gear mounted on a shaft carrying a crank, a shaft mounted longitudinally of said base capable or moving vertically therefrom, hangers connected to said shaft, a channel bar slidingly mounted in said hangers and a connecting rod uniting said crank and said channel bar to reciprocate said channel bar.

5. In a valve grinder of the. class described, a base, standards mounted on the base having bearings inwhich a shaft carry ing a driving gearis journa-led, a pinion meshing with the driving gear mounted. on a shaft carrying a crank, a. shaft mounted longitudinally. of said base capable of mov ing vertically therefrom, hangers connected tosaid shaft, a channel bar slidingly mounted in said hangers and a connecting rod uniting said crank and said channel bar to reciprocate said bar, brackets carried by said shaft, spindles mounted in said brackets so as to oscillatehorizontally andmove vertically and means connecting.saidspindles and reciprocating bar to oscillate said spindles.

6. In a. valve. grinder of the class described, a shaft mounted in slotted brackets fastened to a base,spring means to normally hold said shaft-in the upper part of said slot, lever means fulcrumedon said base to move said shaft downward in said slots, brackets carried by said shaft, spindles mounted on said brackets so as to oscillate horizontally and move vertically, a =recprocating channel bar mounted in hangers depending from said shaft, slotted pins rotativel'y mounted through the sides of the said channel bar, pins extending; from said spindles so as to engage the slots of the said slotted pins, and means to; reciprocate said channel bar.

T. In a grinding machine of the class described, a plurality of spindles capable of vertical movement, stationary members carried by said spindles, valve bits ha ving teeth engaging" with said menibers, means to oscillate said spindles, and means to move the spindles, so as to press the valve on its seat.

DANIEL arrnnears.

In the presenceof H. J. HARMAN,

Linvnnivon C, RUPP. 

